From: Maxim Levitsky <maximlevitsky@gmail.com>
Date: Sun, 09 Jan 2011 01:57:12 +0200

    NET: IPV4: ARP: allow to invalidate specific ARP entries
    
    IPv4 over firewire needs to be able to remove ARP entries
    from the ARP cache that belong to nodes that are removed, because
    IPv4 over firewire uses ARP packets for private information
    about nodes.
    
    This information becomes invalid as soon as node drops
    off the bus and when it reconnects, its only possible
    to start takling to is after it responded to an ARP packet.
    But ARP cache prevents such packets from being sent.
    
    Signed-off-by: Maxim Levitsky [off-list ref]

Applied, thanks.